use std::error::Error;
use std::fs;

pub struct Config {
    keyword: String,
    filename: String,
}
impl Config {
    pub fn new(args: &[String]) -> Result<Config, &'static str> {
        if args.len() < 3 {
            return Err("not enough arguments");
        }
        let keyword = args[1].clone();
        let filename = args[2].clone();
        Ok(Config { keyword, filename })
    }
}
pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
    let contents = fs::read_to_string(config.filename)?;
    println!("With text:\n{}", contents);

    Ok(())
}


#[cfg(test)]

mod tests{
    use super::*;

    #[test]

    fn one_result(){
        let query="duct";
        let contents = "\
        Rust:
        safe, fast, productive.
        Pick three.";
        assert_eq!(vec!["safe, fast, productive."],search(query,contents))
    }
}

fn search<'a>(query:&str,contents:&'a str)->Vec<&'a str>{
       vec![]
}